bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2011 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
| 9 | #include <GL/osmesa.h> |
| 10 | |
tomhudson@google.com | 6c8c34e | 2012-02-14 15:31:03 +0000 | [diff] [blame] | 11 | #include "gl/SkMesaGLContext.h" |
bsalomon@google.com | 003a8b9 | 2012-05-07 17:38:49 +0000 | [diff] [blame] | 12 | #include "gl/GrGLDefines.h" |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 13 | |
bsalomon | 1080596 | 2014-10-08 04:45:09 -0700 | [diff] [blame^] | 14 | SkMesaGLContext::AutoContextRestore::AutoContextRestore() { |
| 15 | fOldContext = (Context)OSMesaGetCurrentContext(); |
| 16 | if (fOldContext) { |
| 17 | OSMesaGetColorBuffer((OSMesaContext)fOldContext, |
| 18 | &fOldWidth, &fOldHeight, |
| 19 | &fOldFormat, &fOldImage); |
| 20 | } |
| 21 | } |
| 22 | |
| 23 | SkMesaGLContext::AutoContextRestore::~AutoContextRestore() { |
| 24 | if (fOldContext) { |
| 25 | OSMesaMakeCurrent((OSMesaContext)fOldContext, fOldImage, |
| 26 | fOldFormat, fOldWidth, fOldHeight); |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | /////////////////////////////////////////////////////////////////////////////// |
| 31 | |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 32 | SkMesaGLContext::SkMesaGLContext() |
bsalomon@google.com | 674a3a2 | 2013-01-07 17:21:07 +0000 | [diff] [blame] | 33 | : fContext(static_cast<Context>(NULL)) |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 34 | , fImage(NULL) { |
| 35 | GR_STATIC_ASSERT(sizeof(Context) == sizeof(OSMesaContext)); |
| 36 | } |
| 37 | |
| 38 | SkMesaGLContext::~SkMesaGLContext() { |
| 39 | this->destroyGLContext(); |
| 40 | } |
| 41 | |
| 42 | void SkMesaGLContext::destroyGLContext() { |
| 43 | if (fImage) { |
| 44 | sk_free(fImage); |
bsalomon@google.com | df8114d | 2013-03-01 18:10:41 +0000 | [diff] [blame] | 45 | fImage = NULL; |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 46 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 47 | |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 48 | if (fContext) { |
| 49 | OSMesaDestroyContext((OSMesaContext)fContext); |
bsalomon@google.com | df8114d | 2013-03-01 18:10:41 +0000 | [diff] [blame] | 50 | fContext = static_cast<Context>(NULL); |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 51 | } |
| 52 | } |
| 53 | |
| 54 | static const GrGLint gBOGUS_SIZE = 16; |
| 55 | |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 56 | const GrGLInterface* SkMesaGLContext::createGLContext(GrGLStandard forcedGpuAPI) { |
| 57 | if (kGLES_GrGLStandard == forcedGpuAPI) { |
| 58 | return NULL; |
| 59 | } |
| 60 | |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 61 | /* Create an RGBA-mode context */ |
| 62 | #if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305 |
| 63 | /* specify Z, stencil, accum sizes */ |
| 64 | fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, NULL); |
| 65 | #else |
| 66 | fContext = (Context)OSMesaCreateContext(OSMESA_BGRA, NULL); |
| 67 | #endif |
| 68 | if (!fContext) { |
| 69 | SkDebugf("OSMesaCreateContext failed!\n"); |
| 70 | this->destroyGLContext(); |
| 71 | return NULL; |
| 72 | } |
| 73 | // Allocate the image buffer |
| 74 | fImage = (GrGLubyte *) sk_malloc_throw(gBOGUS_SIZE * gBOGUS_SIZE * |
| 75 | 4 * sizeof(GrGLubyte)); |
| 76 | if (!fImage) { |
| 77 | SkDebugf("Alloc image buffer failed!\n"); |
| 78 | this->destroyGLContext(); |
| 79 | return NULL; |
| 80 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 81 | |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 82 | // Bind the buffer to the context and make it current |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 83 | if (!OSMesaMakeCurrent((OSMesaContext)fContext, |
| 84 | fImage, |
| 85 | GR_GL_UNSIGNED_BYTE, |
| 86 | gBOGUS_SIZE, |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 87 | gBOGUS_SIZE)) { |
| 88 | SkDebugf("OSMesaMakeCurrent failed!\n"); |
| 89 | this->destroyGLContext(); |
| 90 | return NULL; |
| 91 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 92 | |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 93 | const GrGLInterface* interface = GrGLCreateMesaInterface(); |
| 94 | if (!interface) { |
| 95 | SkDebugf("Could not create GL interface!\n"); |
| 96 | this->destroyGLContext(); |
| 97 | return NULL; |
| 98 | } |
| 99 | return interface; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 100 | |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 101 | } |
| 102 | |
| 103 | void SkMesaGLContext::makeCurrent() const { |
| 104 | if (fContext) { |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 105 | if (!OSMesaMakeCurrent((OSMesaContext)fContext, fImage, |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 106 | GR_GL_UNSIGNED_BYTE, gBOGUS_SIZE, gBOGUS_SIZE)) { |
| 107 | SkDebugf("Could not make MESA context current."); |
| 108 | } |
| 109 | } |
| 110 | } |
djsollen@google.com | c9542ca | 2013-10-09 18:25:38 +0000 | [diff] [blame] | 111 | |
| 112 | void SkMesaGLContext::swapBuffers() const { } |